Collapsible carton



June 15,l 194s. @REMY 2,321,848

' COLLA`PSIBLE CARTON I Filed Nov. 18, 1940 5 Sheets-Sheet l IIJVENTOR 'Jof 0 A95/L Y ATTORNEY June l5, 1943.

J. o REILLY 2,321,848

COLLAPSIBLE CARTON v Filed Nov, 1a, 1940 5 sheets-sheet 2 /20 (ZZ 20 Q M M- LL. LQ Lg, J L/4 f.

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' 8 f /3 1-r..- V y `l- /0 #V7 i-L 1 1, 1 /L- J -f L -J L I-Lff 7 30 \"7" y INVENTOR ATTORNEY June 15, 1943.

J. o REILLY COLLAPS IBLE CARTON 5 Sheets-Sheet 3 Filed Nov. 18, 1940 onadWvW, W

' INvs-:NToR y Jag 'f/LL Y BY ,@W MMA ATTORNEY HILI. DHH. I

June l5, .1943. J, o'RElLLY 2,321,848

COLLAPSIBLE'CARTON Filed Nov. 18,`194o 5 sheets-sheet 4 l l INVENTR JOE ORE/1 Y ATTORN EV June l5, 1943. J. oRElLLY coLLAPsBLE CARTON 5' sheets-sheet 5 Filed Nov. 18, 1940 ATTORNEY Patented June 15, 1943 UNITED STATES PATENT OFFICE coi-.LPsIL CARTON Joe ORevilly, Tacoma, Wash. Application November 1s,1940, serial No. 366,109

7 Claims.

This invention relates to improvements in egg cartons, and has reference more particularly to cartons which, as made, are collapsed for easy storageand handling, with the intent that they be erected at their time of use.

The present invention deals primarily with collapsed cartons made from cardboard, and containing two rows of cells dei-ined, within the main body of the carton, by a' succession of cross partitions and aninserted divider or division sti-ip; l

To my knowledge, there are egg cartons now in general use equipped with somewhat similar cross partitions, and which are retained collapsed until their time of use, but which, at the time of erection, receive a longitudinal divider' which provides the carton with two rows of cells. The reason for the insertionof the divider after erectionjof the carton is by reason of the fact that neither the carton nor the divider is of such construction that the divider can be assembled with the cross partitions while the carton body iscollapsed, and must necessarily be applied after the carton' is erected.

In View of the above, it has Ybeen the principal object, of this invention to improve'upon present-1 day collapsed cartons of the character to which this invention belongs, in those certain details that permit the divider or division strip t be inserted and interlocked with the cross-partitions and'bottom wall of the carton body whilethe carton is collapsed and which provide that upon erection of the carton, thecross partitions and the division strip will be automatically moved into their respective, erected positions' and, by

this movement; will effect an automatic interlock that prevents return of the carton toa collapsed" condition.

Morej specifically stated, the objects of the present invention lreside in the novelo'featu'res and in the details ofconstruction ofthe carton body, the cross partitions and the longitudinal divider, whereby erection of the carton' body will automatically eiTect a simultaneous erection of all the partitions therein to form the twoiows" in their relationship and combination, whereby a simple, effective and desirable type of carton is produced.

In accomplishing these and other objects of the invention, I have provided the improved details of construction, the preferred' forms of which are illustrated in the accompanying draw# ings, whereini Fig. 1 is a perspective view of thecarton as erected andA with the top in open position. l

Fig. 2 is a cross sectional view ofthe carton. Fig. 3 is a longitudinal sectional view of the same, on line 3 3 in Figj 2. -1

Fig. 4 is a plan View of the body blank of the carton as cut and scored" preparatory to its being folded and glued to formY the carton body.

Fig'. 5 is a plan view of the longitudinal divider. Fig. 6 is a plan View of a' portion of the collapsed `carton; the View having apart broken away for better illustration. Fig. 7 is an under side view of the collapsed carton as seen in Fig.l 6. y

Figs. 8, 9 and 1'0 are viewsl diagrammatically illustrating the folding'and making of the col-` lapsed carton.

Fig. 11` is a View illustratingthe manner of holding ther carton for'erection. Fig. l2 is a cross sectional view illustrating a carton of alternative form; Fig. 13 is a cross s ecti'o'nal'vie'w of a carton using a floating false bottom wall. Y Fig. 14 is a fragmental plan View showing portions of a modified form of carton adapted to be divided.

Fig.v 15 is a view of the diivder strip as formed for use in the divisible carton.v

Explanatory to tli'einven'tion, it will be stated that the present carton is formed from a single cardboard blank that; is so cut, punched, scored, folded 'and joined, that it may be readily erected from ilat, collapsed condition to the form of a rectangular box-like container suitable forvthe packaging of eggs or the like. Associated with the prepared body blank in a novel manner, is a single, longitudinal "stripof cardboard that; con# stitutes the division strip or'divide'r and which coacts with the several transverse'partitions, the

bottom Wall and side walls of the carton in a manner whereby to form the two rows of cells for reception of the eggs, or the like.- The division strip in this instance interlockswith the bottom` wall formingpanel or section of the carton and also with the several transversel partition forming" sections in such novel 'manner thatl upon erection of the carton, all of the partitions will automatically be brought into their erected relationship.

Heretofore, collapsed cartons somewhat similar to the present have been made, and those parts which form the transverse partitions therein likewise have been incorporated in the cardboard blank from which the carton body is formed. However, to my knowledge, no carton has heretofore been used having a longitudinal division strip assembled and interlocked with those parts forming the bottom and cross partitions of the carton prior to the erection of the collapsed carton, or associated therewith in any such manner that upon erection of the carton, the erection of the cross partitions will be effected, and an interlock of these parts brought about that will positively prevent collapse oi the erected carton.

Referring now more particularly to Fig. 4:

This view discloses the details of scoring, cutting and notching of a cardboard blank from which the carton body and cross partitions is to be made. The blank, designated in its entirely by reference character I, is of a rectangular form and is transversely scored, or creased, and cut at various locations to dene the limits `of the opposite side wall panels, and the top and bottom forming panels of the carton. Also, to provide a cover forming panel, a locking flap and an attaching strip.

It will be noted further, by reference to the drawing, that across the upper end of the prepared blank, as shown in Fig. 4, are scored lines or creases, indicated by reference characters 2 and 3, which are applied for easy and accurate bending or folding of the blank. The scored line 2 is spaced slightly from an end edge of the blank parallel therewith, to set off that portion designated as the locking flap. This constitutes that short length of the blank spanned by the bracket a in Fig. 4, and the flap is designated by reference numeral 4.

The scored lines, 2 and 3, are spaced apart a distance corresponding to the transverse width of the finished carton, and the `panel 5 that is located between these lines, forms the top or cover portion of the carton; the top forming panel being identied as that spanned by the bracket b in Fig. 4.

That panel of the blank I which forms the bottom wall portion of the carton is designated by reference numeral 'I, and it comprises that portion of the blank that is spanned by the `bracket c. The opposite edge limits of this bottom panel are determined, respectively, by transverse lines of intermittent scoring, as seen in Fig. l at Band 9; these lines being spaced apart substantially the same distance as the spacing of the lines of scoring 2 and 3. The short lengths of intermittent scoring in each of the two lines 8 and 9, which dene the side limits of the bottom panel 'I, alternate with the angular cuts designated at III, which set off the opposite side and bottom edges of a succession of partially detached tabs II at opposite edges of the bottom panel l. The purpose of the tabs II presently will be explained.

One of the side wall forming sections, or panels, of the carton comprises that part of the prepared blank that is between the transverse score lines 3 and 8, while the panel or section for the opposite side wall of the carton is set off between the transverse line of scoring 9 and a transverse line of scoring I2. These opposite side wall forming panels respectively are designated in Fig. 4 by reference numerals I3 and I4, and are spanned by the brackets d and e, and it is to be observed that the panel or section panel I 3 from which the cover panel 5 continues, is somewhat wider than the opposite side wall panel I4; this being understood best by reference to Fig. 2.

Spaced slightly from the lower end of the blank is a transverse line of scoring I5 which sets off the attaching strip I6, and between the lines of scoring I2 and I5 is a panel, spanned by the bracket f in Fig. 4, which provides the material from which the several transverse partitions are formed, as later will be described in detail. This panel is equal in width to the width of the bottom wall forming panel 'I.

The locking flap 4, as noted, is formed with a succession of hooks 20 at its exposed, longitudinal edge; each hook providing a notch 2| opening laterally into a flared mouth 22 that opens to the end of the blank. All hooks are pointed in the same direction and are of the same size. Medially of the panel c, which forms the bottom wall of the carton, is a row of spaced, longitudinally aligned slots 24 which, as will presently be understood, provides the means for effecting the interlocking of the division strip 40 with the bottom wall of the carton.

The panel from which the transverse partitions are formed, spanned by the bracket f in Fig. 4, is punched to provide a succession of elongated openings25 extending directly between the lines of scoring I2 and I5. These openings are equally spaced, and each has a correspondingly located straight edge 25a extending from the line I2 to theline I5, and has an opposite edge 25h that terminates short of the lines I2 and I5 and then slopes angularly, as at 25o, to the junction of the edge 25a with the lines I2 and I5. Cuts 28 in the blank extend from these junction points alongthe linesV I2 and I5 to points aligned with the lines 25h, thus to detach the ends of those sections of material between the openings 25. These cuts, together with the openings 25, provide the transverse partition forming sections which are designated by reference numeral II. Each of these sections I'I is `held attached to the body blank only by small triangular portions of material 30, at the opposite ends of and at the top edge of the partition section. These triangular attaching portions 30 are bounded by the sloping edges 25o, the adjacent lines of scoring I2 or I5 and lines of scoring 3I that continue from and in alignment with the edges 25h of the openings 25 to the lines I2 and I5.

It will be noted that in Fig. 4 the opposite ends of that section or panel of the blank that is spanned by the bracket f, are inwardly cut away to provide recesses 25x which correspond in size to the openings 25, and that the material at the left-hand end of this panel is centrally divided by a cut' 35, from line I 2 to line I5, to form two transverse partitions designated at I'Ia and I'Ib. This is in order that the two cells that are to be provided adjacent that end of the carton may be closed at both sides. The bottom edges of these'two partition members are formed by the cut 35.

Each cross partition member is also provided at a medial point in its top edge with a perpendicular notch 38 that extends practically halfway to the bottom edge of the member.

'In Fig. 5 is shown, at 40, the divider or division strip that is to be applied to the carton. This strip is of a width substantially equal to the height of the side wall spanned by the bracket d and has a length equal to the width of the agate@ blankv and it is formed with a plurality oi lequally spaced-slots or notches 4| extended upwarclly thereinto from its bottom edge to` near the top edge of the strip. One 'side edge of each slot vor notch 4|', suchas that designated at `4|1 in Fig. 5, is practically straight, being only slight# 1y curved, as at42, to widen the mouth or entrance to the notch. The otherside edgeof the slot'is practically parallel with theiirst inentioned edge from the upperV endv ofthe slot to about one-thirdV the distance to the bottom of the strip. Then the edgeis roundedlaterally, as at 43, providing a'wi'de open/'mouth 4 4 leading into the upper portion of the notch. f :The several notches set oi asuccession of ltabs or tongues 45 along the lower edge of the *division 'strip and the lower end of each tongue terminates in a hook portion 46 directed into'theniouth 4 4 of the adjacent notch and Veach hook provides a horizontal notch or slot `4`l opening intol the said mouth. l y

The slot or notch 4| at the right-hand end of the dividing strip, as seen in Fig. 4, is quite close to the end'of the strip and sets off a narrow, depending tongue 48'provided in its outer edge with a notch 48 that is aligned with the hook notches 41. Y The several tongues or tabs 45 that are set o ff between the notches 4|, serve todivide those spaces between the transverse partitions Il into paired cells, and at the left-hand Yend ofV the division strip, as noted in Fig. 5, the tongue 45x is smaller and is rounded oi at bothV edges, thus to provide that it will enter between the partition walls Vla and |711 in the erection of the carton, as presently will be explained.' At that end'of the blank, also, the material is cut away above the hook 46 to provide the recess 41 which gives necessary clearance fory assembly of. parts.

Assuming the parts I and 4!) to be so constructed, the Ycollapsed carton is formed there'f' from asiollows: Starting, for example`,fwiththe scored blank lying fiat, that end portion thredf comprising the strip Ity and partitionfor'm'i g portion of the blank, including the V"attaching stripf 4, the top panel 5 and the side wall lfto'whicn the panel 5 is attached, is folded',back,"overy the first made fold, bending'the blank on the`sc`cred` line 8, thus to bringthe parts to the nat collapsed position of Fig. 9, and causing the strip Iiito;` beadhesively attachedto the side wall section or panel I3 overlying it. Then the longitudinal'y partition, or dividing strip '4lliis inserted; this being done either mechanically or manually, but preferably by mechanical means in order to exf pedite the assembly.

between the top panel 5 and the partition forming panel so that the tabs or tongues 45 slip into the'openings 25, and between thepartitions l|'|x in afmanner as illustrated in Fig. 6, and eiiecting the extension of the hooks 46 through 'the slots 24 in the'bottom wall panel of the folded blank.

so that the parts nally assume the positionil'lus-4 trated in Figs. 6, 7 and 10.

In the insertion of the division strip 40.,.Cor-

responding side edges of successivetongues or tabs 45, which may be referredto as their carrr This strip isv assembled with the folded blank by inserting its lower edge firstA 45 section within bracket f in Fig. 1L isvfolded b a kVv edges, and which are designated at 43 in Figs. 4 and 6, overlap theupperfsurfaces of successive partitions while the opposite edge portions oi these tongues' underlie the top edge portions of next adjacent parts, as will be understood by reference to Fig. 6. Also, itis to be understood that in bringing these parts into the assembled relationship shown, first by moving the partition strip sidewise in the direction of the arrow there- A on in Fig. 6, the notches 38 in the top edges of the cross partitions I1 will'receive side edge porj tions of the tongues insuch manner that inthe nnal position of parts in the collapsed carton, the closed, or continuous top edge portion ofthe dividing strip overlies all the partitions I'| at the right-hand 'side of the notches (reference being had to Fig. 6), while the end hooks 46 underlie all partitions l and also extend through the slots 24for` their interlock with the bottom wall panel. This interlock is completed after the division strip has been inserted, by moving the strip slightly endwise. This movement brings the hook ends to the position illustrated best in Fig. 7` with the hook notches 4l interlocked in the corr'4 responding notches 24.

Now,v assuming that the parts are so assembled, to erect the collapsed carton, it is grasped in .the hand as illustrated in Fig. 11, which showsA the. carton in end view. The thumb and fingers engage the collapsed carton at diagonally opposite corner edges, and` by pressing these edges towardv each other, the carton will be brought to thel erected, rectangular condition as it isillustrated.l by the dotted lines in Fig. l1. In this operation, of erecting the carton, the division strip 4U, by.

reason of its interlock with the bottom wall panel;

and with the notched parts of the partition walls, will be swung to an upright position, as illustrated in Figs. 2 and 11, and by this move-k ment, will eiect the swinging of the successiva. partition members Il to downwardly folded rposi'- tions as seen in Figs. 1 and 31. This is by reason, of the fact that when the division strip swings to vertical erected position, the camming surfaces 43 of the several tabs or tongues 45 engage. the partitions in such manner as to push thern downwardly, bending` on the scored lines, 3|. When the cross partitions swing to the downwardly folded positions, they still retain an inter-r lock with the division strip by reason of the intertting of the notches 38 and 4|, and this in, terlock retains the carton in its Yupright or erected. position against accidental collapse. Onev ofthese points of interlock is designated at X, in Fig. 1 and it'is to beunderstoodthat such an` interlock is effected between each cross partition andthe division strip,

The cover panel 5 of the carton maybe locked.. in closedposition inthe usual manner merely by. applying the hook portions 2Q of the locking iiap.

' 4 /beneaththe triangular portions 3G which join the transverse partitions to the side walls.- This will be understood by reference to Figs. 1 and 2.y

It Vwill here be explained thatwhen the side walls are erected, by bending them upwardly "relative to the bottom panel along the scored5 lines 8 andi), the tongues or tabs that are .l

dened'by the angular cuts It ldo not bend relative to the side walls and thus provide aseries` of supports along each side wall of the carton, as seen in Figs. 1 and 2..

in Flg. l2 Iliave illusrfiied an alternative,v form'of construction, quite similar to that al-V ready described except that in the formation of the bodyblank, the transverse lines of scoring 8 and 9 are continuous, and the angular cuts I are eliminated. Thus, when the collapsed body is erected, there will not be provided the supports Il of the carton shown in Fig. 1. This'neces'sitates that, to permit placing the carton flatly upon a supporting surface, the bottom panel be upwardly formed along the central portion, as illustrated in Fig. l2; the formation of this ridged bottom being facilitated by placing a line of scoring along the line of slots 24 of the blank. The bottom panel in this case would be made slightly wider than the partition forming panel, and thus the formation of the ridged bottom would not cause the side walls to be inclined.

In Fig. 13, I have illustrated another alternative form of construction in which the body is made similar to that of Fig. l, with the exception of its having the supports Ii eliminated therefrom, as is the carton of Fig. 12, and inserted within the carton is a false bottom panel Bil Awhich is formed with a longitudinal row of slots 24m corresponding to the slots 25 of the panel shown in Fig. 4. This false bottom is inserted between the folds at the time of forming the collapsed carton, and when the partition strip 40 is inserted, as has previously been described, the hooked ends are applied through the slots 2am the same as they were applied through the slots 24.

In Figs. 14 and 15, I have illustrated modifications of the structure of the carton to provide for dividing it after it has been erected and lled. For example, most cartons are made to contain one dozen eggs. If a customer desires to purchase only a half dozen, a filled carton may be broken in two, so as to accommodate the cus.

tomer. In this construction, the body blank is longitudinally divided by a line of perforations, indicated at 10; this line of perforations being midway of and parallel to the side edges of the body blank. The panel f of the blank is formed with the recesses and slits which set ofi the transverse partitions in the same manner as for the carton already described, except that the partitions at opposite sides of the division line face in opposite directions. partitions next adjacent the right-hand side of the line of perforations Til correspond to the partitions I'la and I'Ib as seen in the blank of Fig. 4, and following these, are the partitions I1 as arranged in the blank of Fig. 4. At the lefthand side of the line of perforations, the partitions are arranged in a similar manner', it being noted that the partitions at opposite sides of the line of perforations are in opposite arrangement.

The division strip used with this carton is centrally divided by a transverse line of perforations 1|, and the formation of the tabs and slits of this division strip are in accordance with the arrangement of tabs on the partition strip of Fig. 5 with the exception ofthe changes necessary to make this strip accommodate the arrangement of partitions shown in Fig. 14.

The assembly of the partition strip in this modification with the carton is the same as previously described, and it will be understood that when the carton is erected or even when it is in collapsed condition, it may be broken in two along the line of the perforations, thus to provide two small cartons of equal size.

In Figs. 14 and 15, the Same reference numerals have been applied to indicate parts therein which correspond to those of the parts illustrated in Figs. 4 and 5.

The particular advantage of the present car- In this blank, thel tons resides in the fact that the division strip may be assembled with the carton in collapsed condition and will automatically move to erected position with the erection of the carton. Furthermore, the details of construction and the interlocked relationship of parts of the transverse partitions yand the longitudinal dividing strip automatically effects the downward folding of the partition strips incident to erection of the carton so that it is not necessary for the user to take time for the application of the divider as is usually done with cartons of this type.

Having thus described my invention, what I claim as new therein and desire to secure by Letters Patent is:

1. A carton of the character described, cornprising a bottom wall, opposite side walls, and a cross panel extending between and fixed to the side walls for flat collapsing of the carton by folding together at diagonally opposite corners; said cross panel being formed'with a succession of naps; each flap having a notch in its top edge and provided with a free edge adapted to be folded downwardly from the plane of the panel to form a cross partition in the erected carton, and ya division strip applied to the carton to lie flatly across the flaps in the collapsed carton and having notches in its bottom edge interlocked within the notches of the cross partitions, and setting olf a succession of tabs; each tab overlying the free edge of the corresponding ap, and said tabs having holding connection at their lower ends with the bottom wall whereby erection of the carton from collapsed condition effects the erection of the division strip with an incident downfolding of the free edges of the naps by said tabs.

2. A carton of the character described, having a body formed from a single blank that is scored and folded to form a rectangular housing comprising a bottom-wall, opposite side walls, and a cross panel extending between top edge portions of theside walls; said parts being permanently joined for fiat collapse of the body by folding together at diagonally opposite corner edges; said cross panel comprising a succession of cross partition flaps, each with a free edge portion that is downwardly foldable when the carton is erected from collapsed condition and each having a perpendicular notch in its top edge, a separately formed division strip disposed longitudinally of the carton, overlying the cross panel flaps and having deep cut notches in its lower edge corresponding in spacing to that of the flaps and interlocked in the top edge notches of the flaps and setting off tabs overlapping the free edges of the corresponding flaps, and having hooks at their lower ends holdingly engaged with the bottom wall, whereby, upon erection of the carton from collapsed condition, the division strip will be moved to erected position, and incident to this movement, the tabs thereof will move the free edge portions of the partition flaps to downwardly folded positions.

3. A carton of the character described, comprising opposite side walls, a bottom wall, and a cross panel extending between the side walls and spaced above the bottom wall, and formed with a succession of cross partition flaps, each with a free edge adapted to be downwardly folded, and each flap having a perpendicular notch in its top edge, the walls and panel being joined for flat collapse of the carton by folding together at diagonally opposite corner edges, and a longitudinal division strip applied atly upon the cross panel of the collapsed carton and formed along its lower edge with deep cut notches forming a succession of separate tabs corresponding t0 the cross naps, and each tab overlying the free edge of the corresponding flap, and underlying the top edge of the next adjacent flap; said tabs being hingedly interlocked at their lower ends with the bottom wall, and the notches between tabs being interlocked with the top edge notches 0f the partition naps whereby, upon erection of the side walls, said division strip is moved to upright position, and the tabs thereof are caused to press the free edges of the cross partition naps downwardly.

4. A carton of the character described, comprising a body having longitudinal opposite side walls, a bottom wall, and a cross panel extending between the side walls across the top of the carton, all parts being hi-ngledly joined at longitudinal edges for flat collapse of the carton by folding together the diagonally opposite longitudinal corners; said cross panel being formed with transverse openings and cuts at their ends setting off a succession of cross partition forming flaps; each ap having a free lower edge portion, and having a notch in its top edge and a longitudinal division strip applied to the carton t0 lie flatly upon the partition forming flaps when the carton is collapsed, and having a succession cf spaced upwardly directed notches formed therein and corresponding to the spacing of the flaps and opening to the bottom edge of the strip, dening a succession of tabs, each overlying the free edge portion of the corresponding ap and underlying the fixed edge portion of the next adjacent flap, and each of said notches being interlocked in a holding connection with the top edge notch of the corresponding flap, whereby, upon erection of the side walls, the division strip will be moved to upright position, and the tabs thereof will actuate the partition flaps t0 downwardly folded positions.

5, A carton as in claim 4, wherein the tabs of the partition forming strip have edges at one side of the notches of the strip rounded off to provide camming edges for engaging the partition forming tabs to move them to the downwardly folded positions.

6. A carton of the character described, formed from a continuous strip of cardboard that is transversely scored, folded and joined to form a carton body of rectangular cross section when erected, and adapted to be flatly collapsed by folding together along diagonally opposite corner edges; said carton body comprising opposite side walls, a bottom wall formed with a plurality of spaced, longitudinal slots, medially thereof, and a cross panel extending between the side walls, spaced above the bottom wall when the carto-n is erected, and formed with a succession of spaced, transverse openings and longitudinal cuts extending from the edgs of said openings thereby to set `off a plurality of cross partition flaps, downwardly foldable therefrom; each of said flaps having a perpendicular notch in its top edge, and a longitudinal division strip applied to lie flatly between the top wall and cross panel of the collapsed carton, and formed along its lower edge f' with upwardly directed notches corresponding to the cross flaps and interlocked with the notches in the top edges of the partition flaps; said notches of the division strip setting off a succession of tabs overlying the free edges of the corresponding partition flaps, and each tab having a hook at its lower end, offset from its corresponding notch and ho-ldingly engaged in a slot of the bottom wall, and one edge of said corresponding notch being rounded olf to provide a camming edge; said longitudinal division strip being movable to an erected position incident to erection of the carton body to cause said camming edges to engage the partition flaps to bring them to downwardly folded positions and to eifect an interlock of the perpendicular notches of the flaps with the division strip.

'7. A multiple cell carton having a bottom wall and opposite side walls hingedly joined therewith and adapted to be adjusted from a collapsed condition to erected position, and a plurality of transverse partition flaps hingedly connected at their ends with top edges of the side walls for flat collapse, and having free lower edge portions adapted to be folded downwardly when the carton is erected from collapsed condition, and a longitudinal partition strip, transversely overlying the partition flaps; said partition being notched along its lower edge to set off a plurality of tabs, each partly overlying the free edge of a corresponding flap, and to be connected at its lower end with the bottom wall, and the said notches being interlocked with the transverse partitions at their top edges, whereby erection of the side walls, through the partition flaps and bottom wall, effects the erection of the longitudinal partition, and causes the tabs of the partition to effect the downward swinging of the free edges of the transverse partitions.

JOE OREILLY. 

